If you put all these categories in one pot you get a list of things which might come handy or important. But what ultimately makes things EDC-worthy is if they are useful enough so you don’t mind carrying them all the time. Useful can mean either it’s very likely that you will need them (your keys, tissue, a small bandaid) or it’s very helpful to have them even if you only need them once in your life (like a tourniquet you can use to stop the bleeding when someones limb got ripped off). This does not mean that you have to carry items from each of the categories above. Go for the ones that are really useful to you.
In other words: Choose things which might be worth the extra weight and bulk in your pants or bag.
The reason why I want to dedicate quite a big part of this site to EDC gear is because I really believe you can benefit from thinking and planning about your kit. There are things you might want to have which are not as obviuos as others. And, first of all, it’s hobby that can be great fun besides being useful.
There’s the “level” approach which splits your EDC in things you carry around all the time, things you have in your bag, things you have in your car and so on. An article at ITSTactical gives more insight.
Two extra things to consider:
In the next upcoming posts I’ll show you my personal EDC setup and give some hints on building your own.